- The average distance is used because the Earth's orbit around the Sun is elliptical, so the distance varies slightly throughout the year. - The official value of 1 AU is defined as exactly 149,597,870,700 meters.
One astronomical unit is the average distance between
Asked in JPSC CS Prelims 2011 · Topic: Measurement/Unit (Non-SI Units (e.g., Astronomical Unit, Light-Year, Electron-Volt))
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